A5061564851- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Ionosphere and magnetosphere dynamics
- Vacuum and Plasma Arcs
- Laser-induced spectroscopy and plasma
- Plasma Applications and Diagnostics
- Laser-Plasma Interactions and Diagnostics
- Dust and Plasma Wave Phenomena
- Metal and Thin Film Mechanics
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Electrohydrodynamics and Fluid Dynamics
- Laser Design and Applications
- Cyclone Separators and Fluid Dynamics
- Atomic and Molecular Physics
- Advanced Sensor Technologies Research
- Spacecraft and Cryogenic Technologies
- Diamond and Carbon-based Materials Research
- Water Systems and Optimization
- Nuclear Physics and Applications
- Thermal and Kinetic Analysis
- Spectroscopy and Laser Applications
- Medical and Pharmaceutic Studies
Kharkiv Institute of Physics and Technology
2016-2025
National Science Center
2015-2025
National Academy of Sciences of Ukraine
2023
Czech Academy of Sciences, Institute of Plasma Physics
2021-2023
National University of Pharmacy
2014
Dnipro National University of Railway Transport named after Academician V. Lazaryan
2009
Numerical calculations of the parameters glow discharge plasma were carried out on basis a global volume-averaged model. The for argon, and iron, main component stainless steel, was assumed as cathode material. electron temperature density, density sputtered iron atoms ions, metastable argon calculated function pressure adsorbed power in discharge. results compared with previous experiments are satisfactory agreement.
This paper briefly describes intrinsic and collaborative scientific activities of the Stellarator Department (Institute Plasma Physics National Science Center “Kharkiv Institute Technology”) within last two years. These include experiments numerical modeling for JET, Asdex-U TCV European tokamaks, stellarators Wendelstein 7-X, TJ-II, LHD, Heliotron-J Uragan-2M, TOMAS toroidal device theoretical studies related to conceptual development stellarator-mirror fission-fusion hybrid.
The mass spectrometric diagnostic complex on the Uragan-2M stellarator has been upgraded. design of vacuum system changed. A for monitoring surface temperature cryogenic trap and pressure in chamber during its heating installed. new PRISMA PRO spectrometer also first measurements dynamics cleaning glow discharge an argon atmosphere have carried out.
Plasma production in stellarators with ion cyclotron heating is complementary to the widely used electron (ECRH). The prospective light minority scenario developed and tried on Uragan-2M Large Helical Device (LHD) had been reexamined at LHD. distinctive feature of this attempt that parameters plasma produced are better than before comparable those by ECRH. This new possibility heating, if it becomes practical, motivates rethinking role stellarator machines.
The experiments carried out in hydrogen at the TOMAS facility show possibility of controlling plasma parameters such as temperature and electron density a combined cyclotron resonance radio frequency (ECR+RF) discharge. A maximum up to ≈6 × 1016 m−3 35 eV are observed ECR+RF propagation RF waves under weak magnetic field is analyzed. Depending on experimental conditions, radial distribution field, there can be several cases: only slow wave propagate, simultaneously fast or propagate....
У роботi показано, що рамкова ВЧ антена, за допомогою якої створюється первiсна плазма в стелараторi Ураган-2М i яка електрично не з’єднана з корпусом установки, набуває як негативного, так позитивного потенцiалу, протягом iмпульсу. Проведено вивчення впливу на потенцiал антени напруги живлення генератора тиску робочого газу. Показано змiну величини потенцiалу одночасної роботи двох генераторiв. Надано теоретичну оцiнку пондеромоторних сил рамкової антени.
The pre-fusion power operation (PFPO) phase of ITER, as described in the ITER research plan with Staged Approach2, includes both hydrogen (H) and helium (He) plasma operations. In preparation for PFPO, WEST JET ran He campaigns to study plasma-wall interactions a tungsten environment. included back-and-forth transition between H or deuterium (D) allowing assessment achievable content well accessible wall reservoirs respective species. changeovers tokamak pulses fixed divertor configuration....
The Toroidal Magnetized System device has been significantly upgraded to enable development of various wall conditioning techniques, including methods based on ion and electron cyclotron (IC/EC) range frequency plasmas, complement plasma–wall interaction research in tokamaks stellarators. toroidal magnetic field generated by 16 coils can reach its maximum 125 mT the axis. EC system is operated at 2.45 GHz with up 6 kW forward power. IC couple 10 MHz–50 MHz. direct current glow discharge a...
This paper summarizes previous results and presents new studies on the ICRF plasma creation both in pure gases gas mixtures. In all experiments, two-strap antenna was operated monopole phasing with applied RF power of ∼100 kW. The research for carried out at frequencies near fundamental hydrogen cyclotron harmonic.
The experiments on medium-size stellarator Uragan-2M (U-2M) in Kharkiv, Ukraine, are carried support of the Wendelstein 7-X (W7-X) experimental program. scenario ion cyclotron frequency range (ICRF) plasma production at hydrogen minority regime had been experimentally tested U-2M and was qualified Large Helical Device (LHD). paper presents results further research ICRF production. discharge studies were out a H2 + He mixture with controlled concentration ranging from few percents to 75%....
To improve the plasma performance and control density quality during flat top phase, wall conditioning techniques are used in large fusion devices like W7-X JT60-SA. study of electron cyclotron conditioning, numerous experiments were performed on TOroidally MAgnetized System, which is operated by LPP-ERM/KMS at FZ-Jülich. It a facility designed to production, plasma–surface interactions. The produced resonance heating plasmas characterized various conditions temperature measurements using...
Abstract Efficient Electron Cyclotron Resonance Heating (ECRH) breakdown and pre-ionization can be achieved with fundamental X-mode, while higher harmonics introduce excessive stray radiation. Fundamental heating however is characterized by a low cut-off density, introducing additional power absorption mechanisms in the plasma. A good knowledge of these necessary to use X-mode as an efficient method. Numerous experiments were performed on TOroidally MAgnetized System (TOMAS) study deposition...
In support of the ICRF experiments planned on Wendelstein 7-X (W7-X) stellarator, i.e. fast ion generation, wall conditioning, target plasma production and heating, a first experimental study has been made in Uragan-2M (U-2M) stellarator using W7-X-like two-strap antenna. all experiments, antenna monopole phasing was used. The operation with launched radiofrequency power ~100 kW have performed helium ( p = (4–14) × 10 −2 Pa) vacuum vessel walls pre-loaded hydrogen. Production density higher...
The results of the plasma start-up with ICRH U-2M RF discharges in H2+He mixture newly implemented controlled gas H2 concentration are presented. W7-X like antenna operated monopole phasing applied power ∼ 100 kW. We investigated pressure range p = 6×10−4 - 9 × 10−2 Pa. Plasma production an average density up to Ne 1013 cm−3 was observed at frequencies fundamental harmonic hydrogen cyclotron frequency.
Abstract This paper presents an overview of the TOMAS plasma diagnostics. The Langmuir probe method is employed to measure electron temperature, density and floating potential distributions.Two triple probes (horizontal vertical distributions) a single distribution) are used. measured parameters by compared. ion neutral atom flux energy distribution respectively characterized with Residual Field Energy Analyzer Time-of-Flight Neutral Particle Analyzer. To determine elemental/charge content...
This report compares results ion-cyclotron range of frequencies (ICRF) plasma production at hydrogen minority regime in Uragan-2M (U-2M) and Large Helical Device (LHD). The condition the presence fundamental harmonic ion cyclotron resonance zone for inside column should be fulfilled this method. scenario is successful both machines weakly sensitive to variation concentration H2+He gas mixture. It noted that LHD start up slower than U-2M. comparison ICRF with U-2M indicate can scaled larger...
This paper explores the plasma parameters of helium and hydrogen Ion Cyclotron Wall Conditioning (ICWC) discharges performed in JET as part a He/H fuelling changeover experiment. The conducted study shows that with higher density is formed than hydrogen. A distinct glow ion cyclotron resonance zone observed throughout discharge He. In H-ICWC discharges, lower radio-frequency coupling efficiency coupled power was He-ICWC discharges. While concentration decreased number pulses same for...
The results of the first experimental series to produce a plasma using ion cyclotron range frequency (ICRF) in large helical device (LHD) within minority scenario developed at Uragan-2M (U-2M) are presented. motivation this study is provide creation conditions when an electron resonance heating start-up not possible, and way widen operational frame machines. major constraint experiments low RF power reduce possibility arcing. No dangerous voltage increase radio-frequency (RF) system elements...
In the TOMAS device, a triple Langmuir probe is used to measure electron temperature and density. The accuracy of this measurement depends on correct determination effective collecting area probe, which complex plasma transport processes. can be calibrated by cyclotron resonance heating experiments using cut-off density ordinary wave (O-wave). This threshold only frequency injected wave, occurrence phenomenon clearly visible in evolution. value consequently known at point calibrate...
Abstract This study aim is to develop further an ion cyclotron range of frequencies (ICRF) method plasma production in stellarators based on the minority heating. The previous studies demonstrate low density (9.5 × 10 17 m −3 ) at power up 0.2 MW. higher ICRF heating experiments become possible after introducing a programmable ramp front pulse. With this trick, all shots went with antenna voltage within safe range. Increase predictably results increase produced plasma. Without pre-ionization...